[2] "No hay mal que dure cien años ni cuerpo que lo aguante" is a saying that literally would mean something like "There's no hardship that lasts a century, nor a body that would be able to endure it" meaning that nothing bad lasts forever. "This, too, shall pass" seems like a good equivalent to me but if anyone knows of a better equivalent, please let me know and I will change it.
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I just got a suggestion from Michelangel and now the phrase will be translated as Nothing bad lasts forever, there's no hardship you cannot endure.